*{
    margin: 0;
    padding: 0;
}
ul li{
    list-style: none;
}
/*html{
max-width: 640px;
}*/
.select{
    width: 100%;
    margin-top: 0.31rem;
    display: block;
    min-height: 0.5rem;
}
.select p{
    float: left;
    font-size: 0.23rem;
    border-radius: 3px;
    padding: 0.05rem 0.1rem;
}
.select p:first-child{
    background: #6ab494;
    color: white;
    margin-left: 0.5rem;
}
.select p:nth-child(2){
    background:#fc9b13;
    color: #ffffff;
    margin-left: 0.2rem;
}
.select p:nth-child(2) span:nth-child(2){
    background: #ffffff;
    color: #fc9b13;
    padding: 0.04rem 0.05rem;
}
.select p:nth-child(3){
    background: #f76249;
    color: #ffffff;
    margin-left: 0.2rem;
}
.select p:nth-child(3) span:nth-child(2){
    background: #ffffff;
    color: #f76249;
    padding: 0.04rem 0.06rem;
}
/*练习题部分*/
.main{
    width: 100%;
    margin: 0 auto;
}
.main_wrap1 {
    width:100%;
}
.main_wrap1 .topic{
    overflow: hidden;
    margin-top: 0.3rem;
    margin-left: -0.1rem;

}
.main_wrap1 .topic span{
    font-size: 0.4rem;
    display: block;
}
.main_wrap1 .topic span:first-child{

    padding-left: 0.5rem;
}
.main_wrap1 .topic span:nth-child(2){
    margin-top: -0.54rem;
    margin-left: 1rem;
}
/*tu*/
.print{
    width:90%;
    height: 3rem;
    background: #d3d3d3;
    margin-left: 0.5rem;
    margin-top: 0.5rem;
}
.print img{
    width: 100%;
    height: 4rem;
}
.key{
    border-top: 1px solid #e6e6e6;
    margin-top: 0.39rem;
}
/************************
.key ul li{
float: left;
text-align: center;
width: 2.5rem;
padding:0.3rem 1rem 0.3rem 0.9rem;
}
.key ul li span{
font-size: 0.36rem;
display: block;
float: left;
}
.key ul li span:first-child{
width: 0.8rem;
height: 0.8rem;
border: 1px solid #4e4e4e;
border-radius: 50%;
text-align: center;
line-height: 0.8rem;
color: #51514f;
}
.key ul li span:nth-child(2){
height: 0.8rem;
text-align: center;
line-height: 0.8rem;
padding-left: 10px;
margin-top: -0.6rem;
margin-left: 0.8rem;
width: 2.8rem;
}
************************/
.key ul{
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    flex-wrap: wrap;

}
.key ul li {
    width: 48%;
    min-height:0.8rem;

    margin-bottom: 0.3rem
}
.key ul li span {
    font-size: 0.35rem;
}
.key ul li span:first-child{
    display: block;
    float: left;
    width: 0.5rem;
    height: 0.5rem;
    border: 1px solid #999;
    border-radius: 50%;
    padding: 0.2rem;
    text-align: center;
    margin-top: 0.2rem;
    margin-left: 0.3rem


}
.key ul li span:nth-child(2){
    display: block;
    float: right;
    margin-top: 0.4rem;
    word-wrap:break-word;
    word-break:break-all;
    width: 70%

}


.analysis{
    width: 100%;
    border-top: 1px solid #e6e6e6;
    margin-top: 0.3rem;
    overflow: hidden;
}
.analysis span:first-child{
    font-size: 0.36rem;
    margin: 0.2rem 0 0 0.5rem;
    color: #999999;
    display: block;
}
.analysis span:last-child{
    display: inline-block;
    width: 100%;
    text-align: center;
}
.analysis p{
    font-size: 0.35rem;
    margin: 0.2rem 0 0 0.5rem;
    display: block;
}
#navigation{
    position: fixed;
    bottom: 0;
    min-height: 0.7rem;
    border-top: 1px solid #999999;
    overflow: hidden;
    background: #ffffff;
    width: 100%;
    padding-bottom: 0.3rem;
}
#navigation ul li{
    float: left;
}
.main button{
    width: 2.5rem;
    height: 1rem;
    background: #fc9e16;
    /* display: block; */
    font-size: 0.36rem;
    border-radius: 10px;
    /* margin: 0 auto; */
    margin-left: 3.5rem;
    color: #fff;
    border: none;
    margin-bottom: 1.5rem;
}
/*收藏题弹出部分*/
.collects_title {
    display: flex;
    justify-content: space-between;
    margin-top: 0.35rem;
}
.collects_title img{
    width: 0.4rem;
    height: 0.4rem;
    vertical-align: top;
}
.collects_title_left {
    font-size: 0.4rem;
    padding-left: 0.15rem;
    line-height: 0.4rem;
}
.collects_title_right {
    font-size: 0.4rem;
    display: flex;
    justify-content: space-between;
    padding-right:0.2rem;
    line-height: 0.4rem;
}
.collects_title_right figure{
    margin-left: 0.5rem;
}
